Heyn is a surname. Notable people with the surname include:
Adolfo Jara Heyn (born 1964), Paraguayan footballer and manager Bertram Heyn (1912–1998), Sri Lankan Burgher general and cricketer Clara Heyn (1924–1998), Israeli botanist David Heyn (born 1945), Sri Lankan cricketer Emil Heyn (1867–1922), German metallurgist Luis Jara Heyn (born 1964), Paraguayan footballer
See also Heyns